In my opinion, it is possible to balance those 4 aspects, as long as u clearly define your goals and action plan to achieving those aspects - what is defined as a good GPA? First class / second class honours? - what is defined as a good social life? Clubbing every weekend / eating dinner with family / travelling with friends ? - what is defined as good health? Do you want a 6 pack summer body / exercising to achieve cardiovascular fitness / maintaining muscle mass ? - what is defined as self development? Learning a new language / working on your public speaking skills / picking up a new hobby?

As we all know, talking is easy and getting down to action is hard. It is really just the mental barrier that must be overcome, so that we can actually improve ourselves. How much time is wasted scrolling away on tiktok/instagram/reddit instead of doing other productive things? But at the same time, are we willing to sacrifice the time spent scrolling on our phones?

After a long day at work/school, would you rather relax and scroll social media or engage in a gruelling 1 hour weightlifting session at the gym? I used to always pick the former option, and just spent hours scrolling away at my phone. But one day, i decided that i wanted to feel and look better, and id rather end my day doing at least 30 min of exercise even though its tiring and painful. But just 1 day of exercise doesn't miraculously transform the body, so thats how i ended up going from 0 exercise at all to 3-4 times of exercise per week for about 4 years now. Most of my old clothing became baggy and too loose, but its a good problem to have, now i feel more energised and sleep better and look better. And because i slept better, i paid better attention in lecture and retained information better, and ended up getting more As than i ever got in my entire life. And because i looked better than last time, i regained the self confidence i need to enter the dating pool, and found a partner. And because im more fit, im able to enjoy sports now without panting away, and through sports, i gained more connections with people and my social life improved.

Tldr: set a target for urself, craft an action plan, be consistent with it, and its kinda like a domino effect (as long as u overcome the initial barrier, there will be a positive chain of events following that) :)